| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] once [prep] [art] | 158 |
|
| 2 | at once [prep] [art] | 139 |
|
| 3 | [prep] once [prep] the | 94 |
|
| 4 | [prep] once [prep] the | 94 |
|
| 5 | [prep] once [prep] a | 63 |
|
| 6 | [prep] once [prep] a | 55 |
|
| 7 | [prep] once to [art] | 35 |
|
| 8 | [prep] once in [art] | 25 |
|
| 9 | [prep] once by [art] | 17 |
|
| 10 | [prep] once with [art] | 14 |
|
| 11 | [prep] once into [art] | 13 |
|
| 12 | for once [prep] [art] | 12 |
|
| 13 | [prep] once on [art] | 11 |
|
| 14 | [prep] once from [art] | 10 |
|
| 15 | [prep] once [prep] an | 8 |
|
| 16 | [prep] once of [art] | 5 |
|
